Pulp-fiber-cleansing apparatus



Feb. 5, 1929.

M. DEZURIK PULP FIBER CLEANSING- APPARATUS Filed Nov. 10, 1924 2 Shasta-Sheet 'Feb. 5, 1929.

M. DEZURIK PUL FIBER CLEANSING APPARATUS Filed Nov. 1o, 1924 Patented Feb. 5, l929.,

MTUIAS DEZRK, 0F SARTELL, MNNESTA.

E'ULP-FIBER-CLEANSING APPARATUS.

Application filed November G, 1924. Serial No. 749,900.

'lll is invention rele-tes to improvements in pulp liber cleansing processes and apparatus particularly adopted for use in cleansing pulp fibers preparatory to being mode or converted into new paper stock, and more purtficulzufly relates to such a process und uppuretus adopted ior use to cleanse and seporiite pulp libers inode from old newspapers, mugguzines, books, etc., from the infipurities contained therein, particularly printers ink, fusing7 etc.

ln the manufacture et new paper stock, it desirable from on economical stond-point, to use old newsimpers, limousines `ioolrsj and the lilre, and the above materiel, o Uer having been disintegrated and reduced, in the usuel manner, to u. tibrous pulpy mess of o liquid consistency, must be passed through u separating' land cleansing process for the purpose oit separating t-lierefronn all such impurities us printers inlr9 sizing7 ete., and ttor the purpose of thoroughly cleansing the linely divided stoclr or pulp iibers.

'llhe particular object of this invention7 therefore? is to provide an improv-ed process and apparatus for removing` from pulp fibers, inl; und other impurities, and also for cleansing` such fibers preparatory 'to being; converted or nninutzictured into new peper stock.

@ther objects of the invention will appear trom thc Ytollowing description und the ncconipunying drawings ond will be pointed out in the annexed claims.

ln `the dln-iwings there hns been disclosed :i structure designed to mrry out the furious objects ot the invention but itis to be understood that the invention is not coni'ined to the exact features showin :is various changes may be made within the scope of the claims which follow.

ln tho drawings Figure l is a vertical-sectional view on the line 1 1 of Figure 2, showing the general construction of the improved apparatus;

Figure 2 is :i iront' View of the apparatus shown in Figure l;

Figure 3 is u detail sectional view on the lino Figure l? showing; the spout or trough into which the waste water and iinpurities are discharged;

Figure l is a similar view on the line of Figure lo;

Figure 5 is a sectional view on the line 5 5 of' Figure l, showing the troug-jh into which the cleaned pulp iibers ire discharged; Figure 6 en enlarged detail' sectional view von the line GMG oi Figure 2, showing` one oi the mixing trol Hs wherein the pur- 't-ially cleaned pulpy moss is discharged from the separating und thoroughly mixed with writer before being discharged to the next separating screen..

Briefly, the invention consists in progres vsivcly ind rfruvice'tionully passing the unclean pulp lihers, in o` watery stricte over the surface of u series ot inclined sepiunting screens9 and alternately od :ne and drainirj' a cleariisine` wetter there until subs-tuntinl-ly :ill ont the inipuriies h'o A been removech `zii-'ter which the cleaned s are discharged into u receiving ineens adjacent the lower portion oit the zipperotus subsequent use irl-the nnin facture ,new paper stock.

rl'he novel pulp liber cleansing;4 ci shown in the accompanying ilruwi ably comprises fil-box like buse structi 'c havingzi series of inclined separating screens i7, Send 9 arranged one Aabove the other is shown in Figure l. 'l`hese screens are suitably mounted between ond secured to 'the opposed members ll und l2 which Aaresupported by upright supportingrV members lll, preifcrebly mounted upon the beams is shown in Fie'- ures l und n. lhc lower ends ot the side nummers il and l2 ire also prepefobly sup ipiortcd upon the booms l fisshovfn.

A suitable receiving moons or trough l5 is provided odjncent the upper odge of the screen if'. luto this trough the uncleuned' pulp lber is discharged in si. Vutcry state from :i di tributingij pipe lo having o plurality of spaced dischiirgc pipes l? connected thereto und adapted to downwardly direct the watery pulp fiber into the trough l5. A feed pipe i8? having o control valve 191 mounteiil therein, is connected to one end oi the distribuiti'ne` pipe 16 end leeds therefrom to u suitable source not sho wn. its "the ur.- clesn pulp liber is discharged into the troiuh itwill overiow the relatively lower woll 2l thereof and will be discharged onto the screen 7 over the surface oit which it will downwardly travel by gravity. From the screen the partially cleaned fibers will discharged into o mixing'box or trough Means are preferably provided Lfor evenly distributing, the pulp fiber over the surface ot' the screen 7. Such means prererably consists in the provision of a member or splash board 28, havingl its ends secured to the end members ll and which board is arranged in spaced relation. to the wall 2l of the trough i5 and also to the bottom wall 24.- ot the trough lo. This splash board functions to prevent the watery pulp mass discharged into the trough l5 from splashing over the wall 2l to the surface of the screen. ylhe space provided between the wall 2l and the lower portion of the splash-board 23 is o'f such size as to cause the material to be evenly distributed over the surface adjacent the screen, thereby eliminating any danger of the material beine' uncvenly discharged to the surface of the adjacent screen which will interfere with the cleansing; and separating process. is the material downwardly travels over the surface of the screen 7, a portion et the water contained therein will drain through the screen and will be discharged to the inclined bottoni wall 25 ot' the apparatus, removinp` with it a portion of the inipurities, while the partially cleaned fibers will be discharged into the mixing` trough 22.

In order that substantially all oi the impurities may be removed from the pulp fiber it is necessary that means be pijpvided whereby a cleansing water may be `added thereto and the partially cleaned fibers thoroughly mixed therewith so that when the pulp is discharged from one screen to the next, a similar cleansing` process will tali place. Such a means is shown in `the drawings, particularly Figures l, 2, 3 and 6. As here shown, a pipe 2G, h ving a series ot clischarge nozzles 27 mounted therein, is arranged directly above each mining trough 9.2 and each pipe Q6 has one end connected to a feed pipe QS whereby water may be supplied thereto. Suitable valves 29 are inter posed in each pipe 2li whereby the supply ot water to the mixing' troughs 29. may be rerulated. The form ol apparatus shown in the drawings comprises three screens having the mixing troughs 22 arranoed therebetween as particularly shown in Figure l. Each mii:- in;r trough preferably comprises an inclined wall 3l to which the lower edges of the screens 7 and 8 are secured by means ot suitable cleats 3Q, and a bottom wall 83 to which the adjacent lower screen is similarly secured b v means ot the cleats 34. The discharge side of each trough 22 preferably consists of an overflow wall over which the watery pulp fibers are discharged onto the bottom wall 33 and thence through a relatively narrow opening or gap 36 provided beneath the splash-board 37. Sin'iilarly, the splash-board 87 is arranged comparatively close to the overflow wall 35 of the mixing trough so that as the material downwardly flows between the two walls it will be evenly distributed over the surface of the adjacent lower screen. The form of nozzle 27 shown in the accompanying drawings is preferably of the t Ype shown in the prior application ot the inventor hereof, filed August 7, 1924, Serial No. 7 ,78, which has eventuated in Fatent No. 1,617,678, da'ed February l5, i927. rlhis type ot nozzle is provided with a narrow elongated discharge opening so that the water discharged therefrom will be spread in the form oi' a. sheet, as indicated by the dotted lines in Figure 3, so that the partially cleaned pulp fibers discharged into the mixing, troughs 22 from the screens 7 and 8 will be thoroughly mixed with the cleansing` water as it is discharged under pressure thereinto. rEhe unclean rater and impurities, separated from the pulp through the screens 7 and 8 discharged to the inclined bottom 2i t the apparatus, is preferably cischarged nto a transverse spout 88, as waste, and may ce dischargec therefrom into a sewer or other receiving means.

From the lower mixing` bei: fibers will be discharged to the 9 and, as it downwardly travels over the suri'iace thereo'li, the major portion of the water contained therein will drain through the screen and be discharged to the lower inclined wall 39 arranged beneath the screen and from which it is discharged into a spout fil. .The water passing through the screen 9 fill be comparatively clean and may therefore be used over again. From the lower screen 9, the cleaned fibers will be discharged into a receiving` spout or trough si?, from whence it will be discharged into a suitable receivingmeans, not shown, for subsequent use in the manufacture of new paper stock.

A platform i3 is preferably arranged adjacent each screen 7. S and 9 and a staim 'ay 4A is preferably provided between each platform so that an attendant may conveniently reach any one of toe screens, should it be found necessary to clean them or in the case of repairs, and the like. The distributing pipe i6 is preiei'ably connected to the 'water feed pipe by means ot a pipe connection 4:5., having` a control valve 4:6 therein, so that should the pulp not have sufficient moisture to cause it to freely flow over the wall 2l of the receiving; box l5, additional water may be added thereto by opening the valve 4.16.

ln the operation of this novel apparatus, the pulp liber is discharged, in a watery state, into the receiving box or trough l5 adjacent the upper edge of the screen 7. From this trough it will overflow the wall 2l and pass between the narrow opening provided between the wall 21 and the silash-board 23, thence to the upper screen 7. is it downwardly travels over the surface of this screen a portion of the water contained therein will drain through the screen thereby carrying Q2, the pulp lower screen with it a portion ot the impurities contained l lli;

until the pulp i'ibers are substantially separated trein one another and liquefied to the extent that they will freely overflow thewall 35 et the raisingY trough and pass down- \.\.'ardly between this wall and the splashboard 37 adjacent the lower screen 8 to resunie their downward travel. Vlhe saine process et separatiand renmving` impurities 'frein the iibers will take place on the screen 8 so that by the tii'ne the pulp reaches the lower inixino trough 22 it will loe coinparatively clean /due to this alternate draining and adding ot water. lt will then again be thoroughly mixed with water and agitated in the lower mixingtrough and will thereafter be discharged to the lower screen 9 where the water will again be drained troni it and will be discharged into the lower receiving' spout l2 in a substantially clean state. Ars hereinhetore stated, the water passing through the screens 7 and 8 will reinove substantially all et the impurities trein the pulp and will theretore be discharged as waste into the spout 38. rlhe water passing` through the screen 9 will'be comparatively clean and may therefore be used ragain in preparing other pulp for a similar cleansing and separating process.

ln the drawings, there is shown a structure coiuprising` three separating screens and two mixing troughs but it is to be understood that any number ot such screens and mining troughs may be usen without departing Yfrom the invention.

llavingr tl'uls described my invention what i ,i as new and desire to secure hy Letters- Patent` is:

l. A pulp 'liber cleansing apparatus coinprising a l ox-lil-e structure havin side walls and an in eline-d hottonn a series ot successive inclinedA screens arranged within the box-like strnctur... and spaced above its inclined bottenur a transversely er:tending` raw stock-receiving trough positioned at the upper end olE the box-like structure and torined with an overflow wall and a splash-hoard positioned to torni a space between it and the overilow wall tor the passage oit stock flowing 'troni the trmighn an openin being formed beneath the splash-board 'for delivery of the stock onto the iugpcrinost screein, and the successive lower screens having;- the lower end ot one screen connected to the upper end of the next screen hy a transversely extending stoclereceiving trough termed with an overtlow Wall lcla dtheretroin, thereby he-V iii i, let/Cl; (ii

V.r each screen hel cime-d bottoni ol i i onto th l ture, the inclined bottoni et he box-like structure extending` beneath all the sieves to-receive the drainage directly tioned splaslrboards being` above the plane oi: the receiving ends or"v the sieves and the plane et the preceding sieve for even distri hution or the stoel: across the surface of the receiving; sieve. f

A pulp liber cleansing; apparatus coniprisinp; a box-l ie structure lawine` side walls and an inclined bottoni. a series of successive inclined screens arranged withir the boli-lil structure and spaced above its inclined hottoin` a transversely extending raw stock re ceivingg trough positioned at the upper end ott' the box-like structure,l and transversely extending` troughs connecting` the discharge end ci one screen with the head et the nervt succeeding` screen, each ot the several troughs havin o; an overllow wall and a bottoin projected, beyond trie overflow wall, a splashhoard spaced frein the overilow-wall of each trough and tterminating` to 'lorin an opening between its lower end and projecting portion of the trough bottoni for the travel et the overflow-steelt trein the trough onto the head ot the next succeeding screein and means tor supplying' water to the stoel; in each trough.

3. nel pulp liber cleansing; apparatus coinu yiuising a box-like structure havinH side walls and an inclined bottoni? a series oi' successive inclined screens arranged within the boyhlfe structure and spaced above its inclined hottoi/1n a transversely extending; raw steelt rec'eiving` trough positioned at the upper end of the box-like structure torined with an overtlow wall and a splash-board positioned to torni a space between it and the ovcr'l'low wall for the travel ot steelt overtiowin I troni the trough, an opening being;1 'torined beneath the splash-hoard for delivery ot stock onto the uppermost screen, transversely extendinp; troughs connecting the discharge end ot one screen with the head ot the next succeedini1 screen, each oit said troughs being` orincd with an overflow-wall and with an inclined. walA to which wall the discharge end of the preceding,` screen is coplanar, a splash-board spaced from the overflow-wall et each of said lll) troughs and terminating to forni an opening` for he tre-vel of the overflow stock from Jshe iough ono l'he head of the next succeeding' Screen, and means :oi' supplying Water to the Stoel: in ouch trough.

4l. A pulp bel cleansing appaiatue coinpi'ising n boslike structure having side 'mills and an inclined bottoni, n seiies of sucoesgive inclined screens ai'ianged within the box-like structure spaced above its inclined bottoni, he inclined boloin extending beneath all the Screens, izms eisely extending troughs oonnoeting the discharge end of one Screen with the head oi 4|che next Succeeding Screen, euch of said li'oughs being formed with :in over- ELXTHIAS EEZ UK. 

